Since this appears to be a top-down view, I think the 0 degree rotation is best, particularly since cardinal directions (North, South, East and West) would be useful for navigation and immersion purposes.
Any idea on roughly how long it will be before the demo is released?
Viewing post in (2nd SDEEP Devlog) Demo coming soon! comments
True 0 degrees is much easier to keep track of in larger maps.
I think what I'll end up doing is making a tile set that works for both angles. Then have orderly maps like abandoned facilities be mostly 0 degrees, while having more chaotic structures like shipwrecks and certain caves use the 45 degree angle for the extra design flare.
And next monday (most likely)